Nut-wrench.



110.849.356. PATENTED' APR. 9, 190v. R. M. ATMORE.

NUT WRENCH.

APPLICATION Hum JULY 26. 1905.

2 SHEETS-$311131 1.

gnoewfoz 1n: NDRRIS PETERS co., WASHINGTON. 04 c.

110 849,356. PATENTED APR. 9, 1907. R. M. ATMORB.

NUT WRENCH.

APPLICATION FILED JULY26,1905;

2 SHEETS-$11331 2.

iwanioz ROBERT M. ATMORE, OF OIMARRON, TERRITORY OF NEWV MEXICO.

NUT-WRENCH.

Specification of Letters Patent.

Ritented April 9, 1907.

Application filed July 26,1905. Serial No. 271.343.

To all whom it may concern:

Be it known that I, ROBERT M. A'rMoRE, a citizen of the United States, residing at Oimarron, in the county of Colfax, Territory of New Mexico, have invented certain new anduseful Improvements in Nut-\Vrenches and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to nut-wrenches.

One object of the invention is to provide a reversible ratchet-wrench embodying such characteristics that it may be efficiently used in the tightening or loosening of nuts of any variety from their bolts.

Another object of the invention resides in an exceedingly simple, inexpensive, durable, and efficient nut-wrench having such construction and arrangement that nuts of different sizes may be manipulated and the ratchet-head may be prevented from backward movement in its rotation in one direction.

A still further object of the invention is to provide a nut-wrench of the ratchet variety whereby the ratchet-head may be turned in either direction and pawls may be supported and arranged with relation thereto so as to prevent backward movement of the ratchethead in its movements in either direction.

ith these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the present invention.

In the drawings, Figure 1 is an elevation of my invention. Fig. 2 is an edge elevation of slightly-modified construction. Fig. 3 is a transverse section through the head of the wrench. Fig. 4: is a detail view of one of the dogs. Fig. 5 is a longitudinal section through the handle of the wrench, the working parts of the wrench being in elevation.

Referring now more particularly to the accompanying drawings, the reference character 1 designates a tapering handle having its larger end bifurcated, as at 2, to form spaced ears 3 and 4, the spaced ears having alining perforations 5 at their outer ends for the reception of the reduced ends 6 and 7 of the ratchet-wheel 8, which latter is arranged between the ears. The ratchet-wheel 8 and its reduced end 6 and 7 are provided with a central opening, as shown, the reduced end 6 having a nut engaging socket 9 of a size somewhat smaller than the nut engaging socket 10 of the reduced end 7 of the ratchet 8, it being seen that the sockets are rectangular in cross-section with each of their sides provided with notches 11 for the engagement and manipulation of nuts of a different size than that afforded by the rectangular sides of each socket. It will thus be understood that each socket 9 and 10 is designed to manipu nate nuts of (lifl'erent sizes, and it will be observed that the reduced ends 6 and 7 of the nut-sockets extend outwardly beyond the corresponding ears 3 and 4.

Pivotally mounted in the bifurcated end 2 of the handle 1 by means of suitable pivotpins 12 are pawls 13 and 14, the said pawls being disposed at the sides of the bifurcation. It will thus be understood the pawls 13 and 14 are spaced from each other, and the inner face of each end of each pawl is provided with a notch 15 and 16, respectively, in which notches is fitted a helical spring 1 7, designed to hold the reduced outer ends 18 and 19, respectively, of each dog normally in engagement with the teeth 20 of the ratchet-wheel to prevent movement of the latter in either direction. Passed through the bifurcation 2, near the bottom thereof, is a pin 21, upon which is pivotally mounted the inner ends 21 and 22, respectively, of two locking-dogs 2S and 24, the inner end of each dog being reduced, as shown, whereby one dog may overlap the other and be pivoted upon the said pin 21 within the bifurcation.

It has been stated that the helical spring 17 serves to hold the pawls normally in engagement with the ratchet-wheel 8 to prevent movement of the latter in either direction. Now when it is desired to rotate the ratchet in one direction the dog 24 may have its bent end 25 swung into engagement with the notch 26 in the outer face of the pawl 14, which will throw the outer end 19 of the said pawl outwardly from engagement with the teeth 20 of the ratchet and permit of rotation of the latter counter-clockwise, the other pawl 13 engaging the teeth to prevent backward movement of the ratchet. Of course, when it is desired to rotate the ratchet Sin the opposite direction it is sim ly necessary to engage the hooked end 27 o the dog 23 with the notch 28 of the pawl 13, the other pawl 14 then serving to act in the capacity as did pawl 13 when the pawl 14 is out of engagement with the ratchet. Of course, both pawls may be disengaged from the ratchet simultaneously by simply engaging the hooked ends of the dogs with the notches aforesaid of the pawls.

From the foregoing it will be seen that I provide-an exceedingly simple and efiicient double-acting wrench embodying such characteristics. that diiferent-sized nuts may be mani ulated with respect to their bolts. The hand e and aforesaid spaced ears may be formed of a single piece of metal or other suitable material; but, if desired, I may provide a wooden handle 29 and secure to the outer end thereof separate plates 30 and 31, as shown in Fig. 20f the accompanying drawings. This latter modification is set forth for the reason that under certain conditions it is possible to use a wrench embodying a wooden handle and in reality may be more advantageous than the heavier metal handle.

hat is claimed is- A wrench comprising a handle having spaced ears formed at one end; a doubleac'ting wrench head including a ratchet mounted between said ears; a pair of oppo sitely disposed pawls pivotally mounted between said ears, each pawl having a notch formed in its outer edge; a spring arranged between the pawls for holding the outer ends of the laigser normally in engagement with the ratchet me wrench-head; a pair of independentlymovable dogs pivotally mounted between said ears, each dog having an inbent outer end adapted for engagement in the notch of the corresponding pawl for moving the latter against the action of the aforesaid spring out of engagement with the ratchet of the wrench-head to. permit rotation of the lat ter in one direction.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT M. ATMORE.

\Vitnesses:

R. H. LUDLUM, H. W. RITTGERs. 

